So I'm guessing I should start from by saying a few things about myself, I've been a vaper for almost 2 years, and I'm mostly an MTL vaper, in this period of time I've never used mods with external batteries, I've only used regulated mods with integrated battery and just this year I had to change around 4 mods because of the failing charging port or battery ,so I got tiered of just wasting my money on them and decided to finally buy a regulated mod with external batteries,and I made the decision to get the VooPoo drag (weird name), the problem that I am having is that I can't make up my mind with chosing the right batteries for it ,I manly vape at around 20-25w and sometimes I might get to 30w with a 0,5 ohm coil, from the web searches that I've done I decided to get either the Sony VTC6 , the VTC5a(altho there are alot of fakes around and I don't really trust the shops in my country ) or the Samsung 25R . Maybe you guys, having a lot more experience than me, can recommend me a battery that I can use safely at the wattage that I vape at since another concern that I'm having is that it might not be safe to use those batteries at a lower power. Also, I'm sorry for my broken English, it's not my native language.